Suspicious vehicle in 3rd Street Tunnel investigated

UPDATE (10:01 a.m.): DDOT says the the tunnel has been completely reopened.

D.C. Fire & EMS says nothing hazardous was found.

ORIGINAL STORY: D.C. Police are investigating an unattended dump truck inside the 3rd Street tunnel.

Police say they came upon the suspicious vehicle just after 8:30 a.m.

Northbound traffic into the tunnel is being affected the investigation.